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Compare Cluster Datastores with Powershell

I showed you before how to compare the datastores for two ESX Servers using the VI Toolkit. But ideally, one would like to compare all ESX servers in a cluster to ensure VMotion and HA compatibility.
So I started scripting and it turns out to be pretty simple: only 4 lines of code in Powershell! It does the comparison for all your clusters and returns clean little tables with datastores you should investigate.